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Finding the Fourth Proportional to 20,418.54, 30,627.99 and 5,627.13

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Solution

The fourth proportional to 20,418.54, 30,627.99 and 5,627.13 is: 8,440.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.54 : 30,627.99 = 5,627.13 : x
  2. Step 2: Convert to fraction form
    20,418.54/30,627.99 = 5,627.13/x
  3. Step 3: Cross multiply
    20,418.54x = 30,627.99 × 5,627.13
  4. Step 4: Simplify right side
    20,418.54x = 172,347,681.37
  5. Step 5: Solve for x
    x = 172,347,681.37/20,418.54
  6. Step 6: Final answer
    x = 8,440.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.